A petition of more than 100 signatories has been drawn in opposition to plans to build a new floodlit sports pitch in the grounds of a leading independent school.

Howell’s School in Llandaff, Cardiff, wants to convert a grass playing field into a “multi-sport synthetic pitch” with perimeter fencing and floodlighting for use by pupils, local sports teams and community groups.

The inclusion of specialist sports lighting alongside the synthetic pitch will mean that the facility is available outside of school hours, with Howell’s proposing extended use from between 8am until 9pm Monday to Friday.

There are also plans to construct a new two-storey sports pavilion, changing rooms and tennis courts – but it is the synthetic pitch that has caused the biggest stir among local residents.

A petition of more than 100 people living in Llandaff and Canton has been submitted to Cardiff council and those on Pencisely Road, which backs onto the playing field, are particularly concerned.

Sarah Barnes, who lives nearby, cited the potential for increased noise and light pollution as cause for objection, while other residents said the school’s plans would exacerbate current traffic congestion.

Nerys Lloyd-Pierce, chairwoman of Cardiff Civic Society, said the proposed developments were “unsympathetic to a conservation area” and would “change the character of this corner of Llandaff forever”.

Another resident, who chose to remain anonymous, questioned the school’s “limited” consultation and opportunity for stakeholders to discuss proposals.

School principal Sally Davis said: “Howell’s School has been part of the Llandaff community for many years and very much values its relationship with its neighbours.

“We have been liaising closely with residents and local community groups over the proposed plans for the development of our sporting facilities and have taken on board many of the comments made.

“The proposed developments will help improve the sporting provision for our students, encouraging young people to lead a healthy lifestyle, which is as important to us as developing their minds.”

Howell’s School is one of Wales’ best-performing and its GCSE and A-level results are regularly among the highest in the country. Residents have until August 28 to submit their views to Cardiff council.